package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对


        //对前端传过来的代码进行md5加密处理（转换成md5） 再与数据库中的密码进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());


        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定

            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工
     */
    public void save(EmployeeDTO employeeDTO) {

        //System.out.println("当前线程的ID"+Thread.currentThread().getId());
        Employee employee=new Employee();
        //employee.setName(employeeDTO.getName()); 不这样一个个赋值 代码太繁琐 可以使用对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);//把前面对象的属性拷贝到后面对象 前提是属性名一致

        //设置账号的状态 默认是正常状态  1正常，0锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码  要将密码MD5加密  默认为123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));


        //注释掉的原因：创建了AUTOFILL类 不需要再手动赋值

        //设置当前创建修改时间
        //employee.setCreateTime(LocalDateTime.now());
        //employee.setUpdateTime(LocalDateTime.now());

        //设置当前的记录创建人和修改人  目前先写死 后面再修改

        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());//怎么动态获取？ 其实在后端向前端返回JWT令牌token时 其附带的里面就会有此次操作人员的name信息 获取即可


        employeeMapper.insert(employee);

    }



    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        long total=page.getTotal();
        List<Employee> records=page.getResult();
        return new PageResult(total,records);
    }


    /**
     * 启用禁用员工
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {
        //修改 根据id修改status
        //update employee set status =? where id = ?

       /* Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);  传统写法 由于employee加了一个Builder注解 可以不这样写*/
        //如下
        Employee employee=Employee.builder()
                                  .status(status)
                                  .id(id)
                                  .build();
        employeeMapper.update(employee);
    }


    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    public Employee getByID(Long id) {
        Employee employee=employeeMapper.getByID(id);//加密的密码也不能传过去！ 怎么办？
        employee.setPassword("****");//设置一下即可
        return employee;
    }


    /**
     * 编辑员工
     * @param employeeDTO
     * @return
     */
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);//把前面对象的属性拷贝到后面对象 前提是属性名一致

        //注释掉的原因：创建了AUTOFILL类 不需要再手动赋值

        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);

    }
}
